﻿/* =========================================================

// jquery.innerfade.js

// Datum: 2007-01-29
// Firma: Medienfreunde Hofmann & Baldes GbR
// Autor: Torsten Baldes
// Mail: t.baldes@medienfreunde.com
// Web: http://medienfreunde.com

// based on the work of Matt Oakes http://portfolio.gizone.co.uk/applications/slideshow/

// ========================================================= */


(function($) {

    $.fn.innerfade = function(options) {

        this.each(function() {

            var settings = {
                animationtype: 'fade',
                speed: 'normal',
                timeout: 2000,
                type: 'sequence',
                containerheight: 'auto',
                runningclass: 'innerfade'
            };

            if (options)
                $.extend(settings, options);

            var elements = $(this).children();

            if (elements.length > 1) {

                $(this).css('position', 'relative');

                $(this).css('height', settings.containerheight);
                $(this).addClass(settings.runningclass);

                for (var i = 0; i < elements.length; i++) {
                    $(elements[i]).css('z-index', String(elements.length - i)).css('position', 'absolute');
                    $(elements[i]).hide();
                };

                if (settings.type == 'sequence') {
                    setTimeout(function() {
                        $.innerfade.next(elements, settings, 1, 0);
                    }, settings.timeout);
                    $(elements[0]).show();
                } else if (settings.type == 'random') {
                    setTimeout(function() {
                        do { current = Math.floor(Math.random() * (elements.length)); } while (current == 0)
                        $.innerfade.next(elements, settings, current, 0);
                    }, settings.timeout);
                    $(elements[0]).show();
                } else {
                    alert('type must either be \'sequence\' or \'random\'');
                }

            }

        });
    };


    $.innerfade = function() { }
    $.innerfade.next = function(elements, settings, current, last) {

        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed, $(elements[current]).slideDown(settings.speed));
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed);
        } else {
            alert('animationtype must either be \'slide\' or \'fade\'');
        };

        if (settings.type == 'sequence') {
            if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1;
            } else {
                current = 0;
                last = elements.length - 1;
            };
        } else if (settings.type == 'random') {
            last = current;
            while (current == last) {
                current = Math.floor(Math.random() * (elements.length));
            };
        } else {
            alert('type must either be \'sequence\' or \'random\'');
        };
        setTimeout((function() { $.innerfade.next(elements, settings, current, last); }), settings.timeout);
    };
})(jQuery);
